Sheave



Patented Oct. 15, 1929 warren STATES ANDREW J. MORGAN, OF FRAMINGHAM, MASSACHUSETTS SHEAVE Application filed May 12,

The invention relates to improvements in sheaves and has reference more particularly to those which embody sister hooks whose lower ends support a pin upon which a roll is mounted, while their upper ends engage an eye-bolt or other hanger. While sheaves of this particular type are usable in other fields, they are of marked advantage in connection with supports for conductor wires, and such a sheave is shown inmy U.- S. Patent No.

1,258,802, of March 12, 1918.

It is one object of the invention to provide new and improved means whereby the hooks are held against each other and hence cannot become accidentally disengaged from the eyebolt or the like, the construction however being such that said hooks may be readily swung apart when initially engaging them with the hanger or when disconnecting them therefrom.

A further object is to provide a novel construction, wherein a spring arm which swings the hooks into contact with each other, also holds one of the hook shanks upon the rollcarrying pin, in such a manner that it may be removed therefrom when desired.

WVith the foregoing in view, the invention resides in the novel subject matter hereinafter described and claimed, description being accomplished by reference to the accompanying drawing.

Figs. 1 and 2 are side elevations at right angles to each other, showing a conductor support embodying one form of the improved sheave, a portion of Fig. 1 being broken away and in section.

Fig. 3 is a perspective view of the spring arm shown in Figs. 1 and 2.

Figs. 4 and 5 are views similar to Figs. 1 and 2 but showing a different form of con struction.

Figs. 6 and 7 are duplicates of Figs. 4 and 5 with the exception that they disclose a still further form of construction.

All forms of construction possess certain features in common which will be covered by one description, and features of difference which will be specifically set forth.

The numerals 8 and 9 denote two vertical hook shanks having oppositely turned hooks 1928. Serial No. 277,164.

1011 at their upper ends, lying against each other for joint, passage through an eye-v bolt or the like12. The lower ends ofthe shanks 89, support a carrying pin 13 for a roll 14,. a conductor 15 being shown resting upon this roll. Pin 13 passes rotatably through an opening 16 in the shank 9, but at 17 is so connected with theshank 8, that no relative turning of pin and shank can take place. An opening 18 is formed dianietri cally through the pin 13. at the outerside of the arm 9, and one end of a spring arm v 19 is passed removably' through said opening 18, the other end or said spring arm being engaged with the shank 9. This spring arm is under longitudinal tension and'as it is virtually secured with respect to the. shank 8 and engages the shank 9, it exerts its tension'to swing the two shanks relatively, thereby maintaining hooks 1011 in contact with 8 each other. I

In the form of construction shown in Figs. 1, 2 and 3, the upper end of arm 19 is formed with a hook 20 which embraces a portion of the shank9, and to hold isaid arm against movement either upwardly or downwardly, I have shown lugs 21 on the shank 9 disposed above and below said hook.

In Figs. 4 and 5, the upper end of arm 19 is laterally bent at 22 and received in a socket 23 formed in the shank 9.

In the form of construction disclosed in Figs. 6 and 7 the outer side of shank 9 is formed with an integral lug 24 having a vertical groove 25 which receives the upper portion of the arm 19, partsof this arm being distorted at 26 and 27, forming abutments engaging the upper and lower sides of the lug 24 to hold the arm against vertical movement.

The illustrations herein given, are some of many provisions which may be made for preventing accidental disengagement of the arm 19 from the opening 18, and it will be understood that within the scope of the invention as claimed, other provision could be made for this purpose.

After the parts are initially assembled,'it will be seen that the arm 19 holds the shank 9 against movement away from the shank- 8 Y and that said arm also acts to relatively swing the two shanks so as to hold their hooks 1011 against each other. This arm yields to permit separation of the hooks 5 when engaging them with or disengaging them from a support such as the eye 12, and if it is ever necessary to disassemble the parts, removal of the arm 19 from the opening 18,

I readily permits such disassembly.

I claim 1. In a sheave, two hook shanks having oppositely turned hooks at their upper ends, the lower end of one of said shanks being formed with an opening, a roll-carrying pin passing rotatably through said opening of the one shank and connected non-rotatably with the other shank, and a spring arm projecting laterally from said pin and held against turning about the same, said spring arm being under longitudinal tension and being engaged with said one shank, whereby said spring arm is active toswing the two shanks toward each other.

2. In a sheave, two hook shanks having oppositely turned hooks at their upper ends, the lower end of one of said shanks being formed with an opening, a roll-carrying pin passing rotatably through said opening of the one shank and connected non-rotatably with the other shank, said pin having an opening at the outer side of said one shank, and a spring arm passed removably at one of its ends through said opening, said spring arm being under'longitudinal tension and having its other end engaged with said one shank, whereby said spring arm is active to swing the two shanks toward each other.

In testimony whereof I have hereunto affixed my signature.

40 ANDREW J. MORGAN. 

